Medicine: Vaccinations in Philadelphia

One of the largest mass vaccinations in U.S. history has occurred during
the past three weeks: an estimated 1,200,000 Philadelphians, spurred
by an epidemic (58 cases) of mild smallpox in Pennsylvania, surged
through doctors' offices. Four physicians were left ill with "local
smallpox infections" (positive vaccination reactions) acquired when
glass vaccine tubes accidentally broke. Their vaccination scars will be
in unusual spots: three thumbs, one right eye.